1. How will you back this contraption into a non-pullthru site? You can't back up over 5' with a toad.
2. It will look like Hogans goat. You'd be better served with a school bus conversion. Look at the 5th wheel type conversion...would any sane person want to be seen towing something like that?
3. The weight of the "now trailer" will be twice that of a conventional travel trailer.
4. How will you stop that creation?
If you ask 100 people what they think of your idea, you won't find over 5 that will give you an honest answer saying "go for it".